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/*
 * Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.switchyard.rhq.plugin;

import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import javax.xml.namespace.QName;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.rhq.core.domain.configuration.Configuration;
import org.rhq.core.pluginapi.inventory.DiscoveredResourceDetails;
import org.rhq.core.pluginapi.inventory.ResourceDiscoveryComponent;
import org.rhq.core.pluginapi.inventory.ResourceDiscoveryContext;
import org.switchyard.rhq.plugin.model.ComponentService;
import org.switchyard.rhq.plugin.model.OperationMetrics;

/**
 * SwitchYard Component Service Operation Discovery Component
 */
public class ComponentServiceOperationDiscoveryComponent implements ResourceDiscoveryComponent {
    /**
     * The logger instance.
     */
    private static Log LOG = LogFactory.getLog(ComponentServiceOperationDiscoveryComponent.class);

    /**
     * Discover existing resources.
     * 
     * @param context
     *            The context for the current discovery component.
     * @return The discovered resources.
     */
    @Override
    public Set discoverResources(final ResourceDiscoveryContext context) {

        final HashSet discoveredResources = new HashSet();
        
        final ComponentServiceResourceComponent parent = context.getParentResourceComponent();
        final ComponentService service = parent.getComponentService() ;
        if (service != null)
        {
            Map metrics = parent.getOperationMetrics();
            final QName serviceName = service.getName();
            
            for (String operationName : metrics.keySet()) {
                final Configuration pluginConfig = context.getDefaultPluginConfiguration();
    
                final DiscoveredResourceDetails resource = new DiscoveredResourceDetails(
                        context.getResourceType(), operationName, operationName,
                        serviceName.getNamespaceURI(), null, pluginConfig, null);
    
                discoveredResources.add(resource);
                
                LOG.debug("Discovered SwitchYard Component Service Operation " + operationName);
            }
        }

        return discoveredResources;
    }
}